THE NEW WORLD MONKEYS OR
THE Platyrrhine Monkeys, so called on account of the wide partition separating their outwardly-directed nostrils, are diversified in form, structure and habits. But although they are more or less specialized, they all retain traces of their common ancestors. They also present characters which distinguish them sharply from the Old World Monkeys or Catarrhini. They are grouped in two families as follows:—
Family I. Hapalidse. Marmosets (Hapale, Midas). ,, II. Cebidas. Teetee (Gallicelnts) > Dourou-
couli (Aotus), Howlers (Jilouatta), Spider Monkeys (AteJcs andJBradiy-teles), Sakis (Pithecia), Ouakaris (Gacajao), Capuchins (Cebus) and Squirrel Monkeys (Sa imim), Woolly Monkeys (LagotJiri-jr).
They are never very large, but the Marmosets are diminutive.
All Platyrrhini are arboreal, and their progress among the trees may be assisted by a prehensile tail. They are vegetarian or insectivorous, and they will show discrimination in the selection of particular insects. Their disposition varies, some being bright and active,